Method for managing concatenated enhanced short message and telecommunication terminal using the method

ABSTRACT

A method for managing a concatenated Enhanced Short Message comprises the steps of creating a status variable representing the READ/UNREAD status of a page; assigning the status variable to each page received by the telecommunication terminal; initiating the assigned status variable into UNREAD; and updating the status variables of all received pages in the message into READ after any one of the received pages of the messages has been read, and updating the status variables of all the previously received pages of the message into UNREAD when a posterior page of the message is received.

FIELD OF THE INVENTION

[0001] This invention relates to a method for managing a short messageat a telecommunication terminal, and in particular, to a method formanaging a concatenated Enhanced Short Message at a telecommunicationterminal such as a mobile phone. The invention further relates to atelecommunication terminal using the method.

TECHNICAL BACKGROUND

[0002] Short Message Service (SMS) is warmly welcome by users of mobilephones. An advantage of SMS over the conventional Call Service is that asender may much less worry about receipt of a message. Even if areceiving terminal is turn-off or in a place having weak signals, themessage will be finally received when the user turns on his mobile phoneor goes into a place having strong signals. However, in regard to theconventional Call Service, most users had such an experience that acalling signal can not be received or the speech quality is degraded ifthe intensity of signals is low in situ. In this situation, the receiverwill not obtain the information unless a communication connection isre-established between the pair in the places having strong signals. Itfurther goes without saying that no calls will be received when areceiving terminal is turn-off. Another advantage of SMS is its lowservice fee.

[0003] At the early stage of the development of SMS, a short messageonly comprises text content without any multimedia information, such asmelodies and pictures, so that the message contains a small amount ofinformation and thus can be consisted of one transport protocol dataunit (TPDU). SMS protocol supports the transmission of such a shortmessage. Recently, Enhanced Short Message Service (EMS) is introduced inthe recommendation of mobile SMS 3GPP TS 23.040. An EMS possiblycontains a lot of information and requires more than one TPDU. Thepresent protocol also supports the transmission of an EMS in network byconcatenating several TPDUs.

[0004] However, the present protocol does not guarantee that theconcatenated TPDUs arrive at a terminal in order. Not only the TPDUsfrom one EMS may arrive at the terminal in disorder, but also the TPDUsfrom different EMSs may arrive interleavingly. For example, two EMSs aresent to a terminal. One is consisted of 4 concatenated TPDUs in theorder of m1, m2, m3 and m4, and the other is consisted of 5 concatenatedTPDUs in the order of M1, M2, M3, M4 and M5. As the protocol does notsupport the arrival of the TPDUs in order, they may arrive at theterminal in the following order of m4, m1, M3, m2, M5, M2, . . . .

[0005] As EMSs may arrive at a terminal in disorder, several problemsissue and need to be solved. The first problem is when the user isnotified of arrival of an EMS. One simplified contemplation is to notifythe user when all the TPDUs arrive. As is well known, one or more TPDUsof an EMS could be lost in the period of transmission. Therefore, inthis contemplation, if one of the TPDUs never arrives, a man-machineinterface (MMI) will not be connected with a application layer of anopen system so that the user will neither be notified of arrival of anEMS nor be able to lookup any content of the EMS. Another considerationis to notify the user of arrival each time when one TPDU arrives.However, sometime, this method will burden the terminal and disturb theuser too much.

[0006] Another design is contemplated by notifying the user of arrivalof an EMS and displaying its content on a screen when all the TPDUsarrives in correct order, and displaying incorrect content (for example,displaying in disorder) on the screen when the EMS arrives in disorderor at least one TPDU is lost. Although, the third design still notifiesthe user of arrival of an EMS even if one TPDU never arrives, the EMS issimply displayed by incorrect content on the screen. It is neitherfriendly to the users nor reasonable to the user interface.

[0007] Therefore, another problem arises, i.e. how to recognize anddisplay individual TPDUs which arrive at the terminal in disorder?

[0008] Still another problem is how to present a “broken” EMS. Here, theterm “broken” means that the EMS is not completed with one or more TPDUsmissing.

[0009] Therefore, there exists a need to provide a improved method formanaging a concatenated Enhanced Short Message at a telecommunicationterminal in order to notify the user of arrival of the message at propertime and display the content of the received EMS reasonably andfriendly.

[0010] Accordingly, an object of the invention is to provide a methodfor managing a concatenated Enhanced Short Message at atelecommunication terminal.

[0011] Another object of the invention is to provide a method fornotifying an user of arrival of an EMS.

[0012] Still another object of the invention is to provide a method fordisplaying an EMS in user friendly way.

[0013] Further another object of the invention is to provide atelecommunication terminal using the inventive method for managing aconcatenated Enhanced Short Message.

SUMMARY OF THE INVENTION

[0014] The present invention provides a method for managing aconcatenated Enhanced Short Message sent by a telecommunication networkto a telecommunication terminal, in which the message comprises at leastone page. The method comprises the steps of:

[0015] a) creating a status variable representing the READ/UNREAD statusof a page;

[0016] b) assigning said status variable to each page received by thetelecommunication terminal;

[0017] c) initiating said assigned status variable into UNREAD; and

[0018] d) updating the status variables of all received pages in themessage into READ after any one of the received pages of the messageshas been read, and updating the status variables of all the previouslyreceived pages of the message into UNREAD when a posterior page of themessage is received.

[0019] In the above method, the message may have one or more pages. Whenthe message comprises at least two pages, each page comprises fields forrepresenting the total number of the EMS pages and its page number. Apredetermined icon is set into a prompt state each time a page isreceived. In this case, the method may further comprise the steps ofactivating a user menu; selecting an entry of short messages from theuser menu and displaying on the screen two items of UNREAD group andREAD group, the UNREAD group including messages having their pages inUNREAD statuses and the READ group including messages having their pagesin READ statuses; designating the UNREAD group and listing the messagesin the UNREAD group on the screen; designating a desired message anddisplaying its content on the screen; updating the status variables ofall the pages of the message into READ; and setting said predeterminedicon into a counter-prompt state. The method of the invention may alsoselect a desired message from the READ group and display its content onthe screen at any time.

[0020] When the last page of the message is received, alerting isprovided and a screen is popped to inform arrival of the message. Atthis time, the method may further comprises the steps of displaying thecontent of the message on the screen when a displaying instruction isreceived; and updating the status variables of all the received pages ofthe message into READ.

[0021] In the above invention, the step of listing the messages in theUNREAD or READ group may comprise the step of listing the UNREAD or READmessages in an increasing or decreasing order according to theirrespective time parameters. The step of displaying the content of themessage may comprise the step of displaying the content of the messagein an increasing order of the page numbers. Preferably, a predeterminedsymbol or string is used to replace a missing page.

[0022] The method of the invention may further comprise the step ofrequesting a recipient work to send a status report for the last page toa message originating terminal indicating that the message has beenproperly received.

[0023] The present invention further provides a telecommunicationterminal using the above managing method. In addition to means forinputting instructions, means for receiving a page, means for storingthe received page, and means for informing the user of arrival of thepage, the telecommunication terminal further comprises: means forcreating a status variable representing the READ/UNREAD status of apage; means for assigning said status variable to each page received bythe telecommunication terminal; means for initiating said statusvariable into UNREAD; and means for updating the status variables of allreceived pages in the message into READ after any one of the receivedpages of the messages has been read and updating the status variables ofall the previously received pages of the message into UNREAD when aposterior page of the message is received.

[0024] The above-mentioned telecommunication terminal may be a mobilephone and the storing means may be a SIM card. Furthermore, thetelecommunication terminal may further comprise means for requesting arecipient work to send a status report for the last page to amessage-originating terminal indicating that the message has beenproperly delivered.

BRIEF DESCRIPTION OF THE INVENTION

[0025]FIGS. 1A-1D are schematic diagrams of a mobile phone showingexamples of 4 display modes according to the present invention,respectively.

[0026]FIG. 2 is a schematic diagram of a data structure of an EMS.

[0027]FIG. 3 is a flow chart of a process for managing an incoming EMSaccording to the present invention.

[0028]FIG. 4 is a flow chart of a process for displaying an EMSaccording to the present invention.

[0029]FIG. 5 is a block diagram of a telecommunication terminalaccording to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] Reference will now be made in detail to the present preferredembodiments of the invention, examples of which are illustrated in theaccompanying drawing. Wherever possible, the same reference numbers willbe used throughout the drawings to refer to the same or like parts.

[0031] Atypical mobile phone is shown in FIG. 1. The mobile phone 10includes a keypad 1 and a screen 2. The keypad 1 comprises numeric keys0-9 and functional keys. The screen 2 is used to display informationsuch as prompt icons, notifications, and short messages.

[0032]FIG. 2 is a schematic diagram of a data structure of an EMS. OneEMS is generally consisted of several concatenated TPDUs, each of whichcomprise TP Header and TP User Data. TP Header comprises information oftransmission such as a telephone number, a service center time stamp(hereinafter denoted as TP_SCTS) which represents the time when thecorresponding TPDU arrives at a service center, and an originatedaddress (hereinafter denoted as TP_OA). TP User Data is consisted ofUser Data Header Length, User Data Header comprising several InformationElements (IE), and Short Message. A concatenated EMS has one more IEthan a conventional message with only one page. Generally, thisadditional IE is arranged as a first IE. Information stored in the firstInformation Element includes IE Identifier, IE Data Length and IE Data.Among these fields, IE Identifier is used to represent the concatenatedinformation of the message. For example, if IE Identifier is 0×00 for 8bit reference number, or 0×08 for 16 bit reference number, thecorresponding message is concatenated. Normally, IE Data Length=0×03 andIE Data consists of 3 octets of Message Reference, Total Number of Pages(i.e. TPDU), and Page Number. All the TPDUs in the same EMS have thesame message reference and originated address. Individual TPDUs in anEMS can be distinguished with their page numbers. For example, an EMScan be represented by a sequence of m1, m2, m3 and m4 in which m is akey word representing the EMS, the numbers 1-4 represent page numbers ofits TPDU members, and thus m1-m4 can be used to represent the respectiveTPDUs in the EMS.

[0033] In the present invention, different EMSs in an input messagesequence are distinguished with the message references and originatedaddresses of the individual TPDUs. The TPDUs with the same messagereferences and originated addresses will be considered belonging to thesame EMS.

[0034] In the present invention, each TPDU is assigned a statusvariable. For a new EMS, the status variables of its TPDUs are set intoUNREAD and the new EMS is classified to an UNREAD group. Once the newEMS has been read, the status variables of all the TPDU members will beupdated into READ and the EMS is classified to a READ group. If thereceived EMS is a broken one and a missing page arrives later, not onlythe status variable of the missing page is set into UNREAD but also thestatus variables of the previous read page of the EMS are updated intoUNREAD. The resulting EMS is re-classified to the UNREAD group.

[0035] In the present invention, users are preferably informed ofarrival of a message in two ways. FIG. 1A schematically illustrates anexample of a display mode in this operating stage. When a first or lastpage of an EMS arrives at the terminal, an alert will be sounded and atemporary screen is popped up, displaying information such as “You havea new short message”. In this case, the user may read the content of theEMS by simply pressing an entry key no matter whether the first or lastpage arrives along with other pages of the EMS at initial time orarrives as a missing page at later time. Here, the first page is thepage having page number “1”, and the last page is the page with thehighest page number of the message. Another way is to lighten apredetermined prompt icon each time a page arrives. In FIG. 1A, the iconis arranged in a bar at the top of the screen. In this case, the usermay activate a user menu and selects an entry for short messages fromthe menu. Then, two items will be displayed on the screen, one forUNREAD group and the other for READ group. FIG. 1B schematicallyillustrates an example of a display mode in this operating stage. Byselecting the item of UNREAD group, some entries, such as telephonenumbers or names, will be listed on the screen, in which all the EMSscorresponding to these entries have UNREAD statuses. FIG. 1Cschematically illustrates an example of a display mode in this operatingstage. By further designating a desired entry, the user may read thecontent of the corresponding EMS on the screen. When one or more pagesof the message are read, the status variables of all the received pagesof the message will be updated into READ and the predetermined prompticon is darken. In the present invention, even though the predeterminedprompt icon is not lightened, the user may activate the user menu on hisown initiative, select the READ group, and then designate a desiredentry to review the content of the corresponding EMS.

[0036] In a preferred embodiment of the present invention, the entriesas shown in FIG. 1C may be listed in a predetermined order according totime parameters of the EMSs. As mentioned above, each TPDU has a TP_SCTSin TP Header, indicating the time when the TPDU arrives at a servicecenter. Individual TPDUs may have different TP_SCTSs even if they belongto the same EMS. To sort the EMSs, the TP_SCTS of a page having theminimum page number is selected from all the received pages of the sameEMS as a time parameter for the EMS. By comparing such time parametersamong the EMSs in the same group (UNREAD group or READ group), thecorresponding entries can be listed in an increasing or decreasing orderas desired.

[0037] In a particular embodiment of the present invention, content ofan EMS is displayed in an increasing order according to the page numbersof its TPDU members. If one or more TPDU is missing, the correspondingcontent is preferably replaced by displaying a special string such as “(. . . )” or a special symbol. FIG. 1D schematically illustrates anexample of such a display mode. This display mode is advantageous due toits consistency with people's reading custom and the ability ofindication of the missing page.

[0038] In an embodiment of the present invention, when an originator ofan EMS sets a “status report” flag in the GSM REC and requests a messagestatus report to realize whether or not the message has been properlyreceived, the destination mobile is designed to request the recipientnetwork to generate a status report only for the last page of themessage. When the pages of the message are arranged in an increasingorder, the last page is the one, which has the highest page number. Thestatus report generated by the recipient network for the last page isconsidered as a status report for the entire message by the messageoriginating mobile phone.

[0039]FIG. 3 is a flow chart of a process for managing an incoming EMSaccording to the present invention. The process begins with Step S20. InStep 20, a new EMS page (i.e. TPDU) arrives at a mobile phone and isstored in a SIM card. In Step S22, a status variable is assigned to thepage and set into UNREAD. Then, the process goes to Step S24, judgingwhether the page is concatenated or not based on IE identifier of theTPDU. If it is not concatenated, that means, the incoming message onlycontains one page, then the process goes to Step S26. In Step S26, analert is sounded, a temporary screen is popped up, and a prompt icon islightened for notifying the user of arrival of the message. If theincoming page is concatenated, then Step S28 compares its page numberwith the maximum page number available for the mobile phone. If the pagenumber is larger than the maximum allowable page number, then thecontent of the page is canceled from the SIM cord and the network isinformed of receipt of the page in Step S30. If not, Step S32 furtherjudges whether there are any other pages which are stored in the SIMcard and belong to the same EMS as the incoming page based on themessage references and TP_OAs of the TPDUs. If no such pages are found,the process goes to Step S36. If some pages are matched, the statusvariables of these matched pages are updated into UNREAD in Step S34 andthen the process goes to Step S36. In Step S36, the process judgeswhether the page number of the incoming page is the highest page number.If it is the last page, the process goes to Step S26, alerting,displaying a piece of information, and lightening a prompt icon. If itis not the lost page, a predetermined prompt icon is lighted on thescreen in Step S38. When the user has read the short message in Step 40,all the associated pages are updated into READ status, and the lightenedprompt icon is darkened.

[0040]FIG. 4 is a flow chart of a process for reading an EMS accordingto the present invention. When information such as “You have a new shortmessage” is displayed on the screen, the user may presses an entry keyin Step S42. Then, the process goes to Step S70 to reading the contentof the new message. Otherwise, the user may activate a user menu toselect an entry of short messages from the menu. Then, two items ofUNREAD group and READ group are displayed on the screen in Step S52.After designating between the two items, the process judges whether theitem of UNREAD group is selected in Step S54. If UNREAD group isselected, the process goes to Step S56; otherwise the process goes toStep S58. In Step S56, the EMSs with UNREAD statuses are listed in anincreasing or decreasing order according to their time parameters. InStep S58, the EMSs with READ statuses are listed in the same way of StepS56. In Step S60, the user designates a desired EMS from those listed.Then, the process goes to Step S70 to display the content of thedesignated message.

[0041]FIG. 5 is a block diagram of an example of a telecommunicationterminal according to the present invention. The telecommunicationterminal 100 comprises an inputting means 102, a receiving means 104, astorage means 106, a variable creating and assigning and initiatingmeans 108, a updating means 110, and a displaying means 112. A newmessage page is received by the receiving means 104 and stored in thestorage means 106. The variable creating and assigning and initiatingmeans 108 creates a status variable representing the READ/UNREAD statusof a page, assigns each newly arrived page said status variable andinitiates the variable as UNREAD status. The updating means 110 changesinto UNREAD the status variables of all the other pages which havealready been stored in the storage means and belong to the same messageas the new page. Information of arrival of the new page is displayed onthe displaying means 112. Then the use may input his instructions withthe inputting means 102 such as a keyboard and read the message. When amessage is read, the updating means 110 changes all the pages of theread message into READ.

[0042] The following is an example. A message sequence is input in theorder of m4, m1, M3, m2, M4, M2. This message sequence comprises twoEMSs. The first EMS is represented by a key word m and consisted of 4pages in which m1, m2, and m4 are respectively the first, the second andthe fourth ones of the EMS. The second EMS is represented by a key wordM and consisted of 5 pages in which M2, M3 and M4 are respectively thesecond, the third and the fourth ones of the EMS. At that time, both thetwo messages are arranged in the UNREAD group.

[0043] As the last page of the message m arrives, a temporary screen ispopped up, displaying “You have a new short message”. If the userentries, the content of the message will be displayed as shown FIG. 1C.And, the status of m1, m2 and m4 are updated into READ and the message mis re-classified into the READ group. The message M is still in theUNREAD group.

[0044] From then on, the user may find the message m in the READ Group.

[0045] If a page m3 arrives later, the pages of m1, m2 and m4 will beupdated back to UNREAD statuses and the message m returns to the UNREADgroup.

[0046] Summing up the above, a status updating method, a notifyingmethod, a compound grouping and sorting method, and a substituted stringinserting method are used in the present invention. More specifically,in the status updating method, a status variable is assigned to eachreceived EMS page. All pages of an EMS change their status variablesconsistently between READ and UNREAD. A new input EMS page will resultsin the changing of other pages stored in SIM card and belonging to thesame EMS as the new page from READ status into UNREAD status. Thenotifying method can be implemented in two ways. When a first or lastpage of an EMS arrives, an alert will be sounded and a temporary screenis popped up, displaying information such as “You have a new shortmessage”. When any page arrives, a prompt icon will be activated. Thecompound grouping and sorting method is used for display modes of thepresent invention. In this method, the EMSs with their pages in UNREADstatuses are classified into an UNREAD group while those EMSs with theirpages in READ statuses are classified into a READ group. In each group,EMSs are sorted in an increasing or decreasing order according to theirrepresentative TP_SCTSs. Each EMS corresponds to a series of the pageswith the same message reference and TP_OA. Furthermore, each EMS isdisplayed in ascent order according to page numbers, in which a missingpage is replaced by a special string or symbol.

[0047] In the present invention, each EMS can be viewed at any time nomatter whether it has been read or unread and whether it is broken orunbroken, except that the whole EMS has been cancelled. The user maydirectly read an EMS when a temporary screen is activated, or find adesired EMS from the UNREAD group or the READ group. Content of an EMSis displayed in a friendly way. It consists with people's reading customand is able to indicate missing pages. Similar to a browser downloadingprocess, a user may read a concatenated EMS little by little, page bypage in the present invention, without requiring arrival of all thepages of the EMS.

[0048] It will be apparent to those skilled in the art that variousmodifications and variations can be made to the present inventionwithout departing from the spirit or scope of the invention. Thus, it isintended that the present invention covers the modifications andvariations provided they come within the scope of the appended claimsand their equivalents.

1. A method for managing a concatenated Enhanced Short Message sent by atelecommunication network to a telecommunication terminal, in which themessage comprises at least one page, characterized in that said methodcomprises the steps of: a) Creating a status variable representing theREAD/UNREAD status of a page; b) Assigning said status variable to eachpage received by the telecommunication terminal; c) Initiating saidassigned status variable into UNREAD; and d) Updating the statusvariables of all received pages in the message into READ after any oneof the received pages of the messages has been read, and updating thestatus variables of all the previously received pages of the messageinto UNREAD when a posterior page of the message is received.
 2. Amethod according to claim 1, wherein the message has only one page, andfurther comprising the step of alerting and popping up a screen todisplay a piece of information when said page is received.
 3. A methodaccording to claim 1, wherein the message comprises at least two pages,each page comprising fields for representing the total number of the EMSpages and its page number.
 4. A method according to claim 3 furthercomprising the step of setting a predetermined icon into a prompt stateeach time when a page is received.
 5. A method according to claim 4further comprising the step of alerting and popping up a screen toinform arrival of the message when a last page of said message isreceived.
 6. A method according to claim 5, further comprising the stepsof Displaying the content of the message on the screen when a displayinginstruction is received; and Updating the status variables of all thereceived pages of the message into READ.
 7. A method according to claim4, further comprising the steps of Activating a user menu; Selecting anentry of short messages from the user menu and displaying on the screentwo items of UNREAD group and READ group, the UNREAD group includingmessages having their pages in UNREAD statuses and the READ groupincluding messages having their pages in READ statuses; Designating theUNREAD group and listing the messages in the UNREAD group on the screen;Designating a desired message and displaying its content on the screen;Updating the status variables of all the pages of the message into READ;and Setting said predetermined icon into a counter-prompt state.
 8. Amethod according to claim 6, further comprising the steps of Activatinga user menu; Selecting an entry for short messages from the user menuand displaying two items of UNREAD group and READ group on the screen,the UNREAD group including messages having their pages in UNREADstatuses and the READ group including messages having their pages inREAD statuses; Designating the READ group and listing the messages inthe READ group on the screen; and Designating a desired message anddisplaying its content on the screen.
 9. A method according to claim 7,wherein the step of listing the messages in the UNREAD group comprisesthe step of listing the UNREAD messages in an increasing order accordingto their respective time parameters.
 10. A method according to claim 7,wherein the step of listing the messages in the UNREAD group comprisesthe step of listing the UNREAD messages in a decreasing order accordingto their respective time parameters.
 11. A method according to claim 8,wherein the step of listing the messages in the UNREAD group comprisesthe step of listing the UNREAD messages in an increasing order accordingto their respective time parameters, and the step of listing themessages in the READ group comprises the step of listing the READmessages in an increasing order according to their respective timeparameters.
 12. A method according to claim 8, wherein the step oflisting the messages in the UNREAD group comprises the step of listingthe UNREAD messages in a decreasing order according to their respectivetime parameters, and the step of listing the messages in the READ groupcomprises the step of listing the READ messages in a decreasing orderaccording to their respective time parameters.
 13. A method according toclaim 9, wherein the time parameter of one message is represented by afield of TP_SCTS in a page of said message, in which said page has theminimum page number among all the received pages of the message.
 14. Amethod according to claim 6 wherein the step of displaying the contentof the message comprises the step of displaying the content of themessage in an increasing order of the page numbers.
 15. A methodaccording to claim 14, wherein the step of displaying the content of themessage comprises the step of displaying a predetermined symbol orstring to replace a missing page.
 16. A method according to claim 3,wherein the step of updating the status variables of all the previouslyreceived pages of the message into UNREAD when a posterior page of themessage is received comprises the step of comparing said posterior pagewith all the pages received by the telecommunication terminal withrespect to their fields of message references and originated addressesto identify the component pages belonging to the same message as saidposterior page.
 17. A method according to claim 3 further comprising thesteps of judging whether the page number of the received page is largerthan the maximum page number available for the terminal; and informingthe network of receipt of the page and canceling the page when the pagenumber is larger than the maximum available one.
 18. A method accordingto claim 3 further comprising the step of requesting a recipient work tosend a status report for the last page to a message originating terminalindicating that the message has been properly received.
 19. Atelecommunication terminal for managing a concatenated Enhanced ShortMessage sent by a telecommunication network, said message comprising atleast one page, said telecommunication terminal comprising: Means forinputting instructions; Means for receiving a page; Means for storingthe received page; Means for informing the user of arrival of the page.Characterized in that said telecommunication terminal further comprises:Means for creating a status variable representing the READ/UNREAD statusof a page; Means for assigning said status variable to each pagereceived by the telecommunication terminal; Means for initiating saidstatus variable into UNREAD; and Means for updating the status variablesof all received pages in the message into READ after any one of thereceived pages of the messages has been read and updating the statusvariables of all the previously received pages of the message intoUNREAD when a posterior page of the message is received.
 20. Atelecommunication terminal according to claim 19, wherein saidtelecommunication terminal is a mobile phone.
 21. A telecommunicationterminal according to claim 20, wherein said storing means is a SIMcard.
 22. A telecommunication terminal according to claim 20 furthercomprising means for requesting a recipient work to send a status reportfor the last page to a message-originating terminal indicating that themessage has been properly delivered.